77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
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/*
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* Copyright (c) 2011 Aeroflex Gaisler
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*
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* BSD license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <asm-leon/leonstack.h>
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#include <asm-leon/irq.h>
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#define NULL 0
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/* single vector trapping version of trap handler installs */
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struct svt_trap_entry
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{
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int start, end, func;
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};
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extern struct svt_trap_entry trap_table[28];
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extern struct svt_trap_entry svt_trap_table_ext[17];
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extern struct svt_trap_entry svt_trap_table_ext_end;
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static struct svt_trap_entry *
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gettrap_pos (int nr)
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{
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struct svt_trap_entry *p = trap_table;
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while ((p->start) || (p->end) || (p->func))
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{
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if (p->start <= nr && p->end >= nr)
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{
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break;
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}
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p++;
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}
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return p;
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}
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int
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svtloleveltrapinstall (int trap, void (*handler) ())
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{
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struct svt_trap_entry *p = gettrap_pos (trap);
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if (p >= &svt_trap_table_ext_end)
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{
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return 0;
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}
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p->start = trap;
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p->end = trap;
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p->func = handler;
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return 1;
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}
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int
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svtlolevelirqinstall (int irqnr, void (*handler) ())
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{
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if (irqnr == 0 || irqnr >= 15)
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{
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return 0;
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}
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return svtloleveltrapinstall (irqnr + 0x10, handler);
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}
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